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Start Over Author "Gomez-Garcia, C.J." Topic complex compounds -- analysis
1 results on '"Gomez-Garcia, C.J."'

1. Single-crystal X-ray structure and magnetic properties of the polyoxotungstate complexes Na(sub 16)(M(sub 4)(H(sub 2)O)(sub 2)(P(sub 2)W(sub 15)O(sub 56))(sub 2)).nH(sub 2)O (M = Mn(super II), n = 53; M = Ni(super II), n = 52): an antiferromagnetic Mn(super II) tetramer and a ferromagnetic Ni(super II) tetramer

Author

Gomez-Garcia, C.J., Borras-Almenar, J.J., Coronado, E., and Ouahab, L.

Subjects
Manganese -- Research, Nickel -- Research, Complex compounds -- Analysis, Ferromagnetism -- Analysis, Chemistry
Abstract

Single-crystal X-ray studies help characterize structures of Mn(II) and Ni(II) complexes of the type (M4(H2O)2(P2W15O56)2)(16-), which are isostructural with the related Cu(II) and Zn(II) derivatives. The complexes have a rhomblike M4O16 group between two fragments of the trivacant Dawson-Wells polyanion (P2W15O56)(12-). The Mn(II) complex shows antiferromagnetic Mn-Mn exchange interactions while the Ni(II) complex exhibits ferromagnetic exchange interactions within the Ni4O16 group. The Ni(II) complex exhibits the highest spin state in a heteropoly complex.

Published
1994

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